WOODWARD 9907-1200 Peak 150 Digital Control

Description

• Model Number: 9907-1200
• Series: Peak 150
• Power Supply: 18–40 VDC (24 VDC Nominal)
• Inputs: * 1 x Magnetic Pickup (MPU) for Speed Sensing
  • 1 x Remote Speed Setpoint (4–20 mA)
  • 4 x Discrete Inputs (Run/Stop, Raise/Lower, Reset)
• Outputs: * 1 x Actuator Driver (4–20 mA or 20–160 mA)
  • 1 x Speed Readout (4–20 mA)
  • 2 x Relay Outputs (Alarm and Shutdown)
• Enclosure Rating: NEMA 4X (Weatherproof when properly mounted)

Product Description The Woodward 9907-1200 is a dedicated Peak 150 digital control designed for single-valve steam turbines. It is an industry-standard solution for controlling turbine speed in applications where complex multi-valve management is not required. The Peak 150 provides high-speed, reliable digital processing to replace older mechanical or analog governors. It features an integrated keypad and display on the front panel, allowing operators to monitor speed, adjust setpoints, and configure PID dynamics directly at the unit. Its robust design is built to withstand the harsh environments of steam turbine decks, providing both control and overspeed protection functions.

Application Areas This controller is primarily used for Steam Turbine Speed Control in various industrial settings, including:

• Pump Drives: Controlling the speed of boiler feed pumps or cooling water pumps.
• Fan Drives: Managing large industrial ventilation or exhaust fans.
• Compressor Drives: Maintaining constant speed or pressure for process gas compressors.
• Small Generators: Basic frequency control for emergency or auxiliary power units.

9907-1200

9907-1200

9907-1200

Product Specifications

• Weight: 3.6 kg (8.0 lbs)
• Dimensions: 284 mm x 190 mm x 102 mm
• Country of Origin: USA
• Operating Temperature: -25°C to +65°C (-13°F to 149°F)
• Communication: RS-232 / RS-422 for service tool interface

Operational Precautions

• Magnetic Pickup (MPU) Clearance: Ensure the MPU is gapped correctly to the gear teeth (typically 0.25 mm to 0.50 mm). An improper gap can lead to signal “jitter” or a total loss of speed signal, causing an immediate turbine trip.
• Actuator Matching: Before commissioning, verify the actuator driver current range (4–20 mA vs 20–160 mA) matches the turbine’s steam valve actuator. Setting the wrong current can lead to sluggish response or valve “hunting.”
• Grounding: To prevent electrical noise from interfering with the sensitive MPU signal, use shielded twisted-pair cabling for all I/O and ground the shield at the control end only.
• Manual Backup: Always ensure a mechanical overspeed trip mechanism is functional on the turbine; the Peak 150 provides electronic protection, but mechanical backup is a critical safety requirement.

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